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The state filed a 35-page response to the appeal with the court, saying the motion is not properly before the appeals court and that Porter does not meet the burden for receiving an injunction.

The state says Porter has not met any of the four factors for getting an injunction, and that he cannot win an injunction on merits because he has been offered immunity for testimony. The state says Porter's claim for perjury lacks merit because of the immunity, and under that, the state cannot use anything he says against him.

The state argues that preventing Porter from testifying "irreparably harms" the state's ability to prosecute Goodson.

The order does not do anything to stop Goodson's trial on charges related to the death of Freddie Gray from starting on time. Jury selection in the case is set for Monday.

Goodson was the driver of the police transport van that Gray was in when he suffered his fatal injuries.

Goodson is facing the most serious charges among the six officers charged in Gray's death: second-degree depraved heart murder, manslaughter, second-degree assault, two counts of vehicular manslaughter, reckless endangerment and misconduct in office.

Prosecutors consider Porter a witness in Goodson's case as well as in the case of Sgt. Alicia White. Porter told investigators and testified in his own trial last month that he told Goodson and White that Gray requested a medic.

During pretrial motions in Goodson's case, Porter declared that if called to testify, he would plead the Fifth Amendment, standing on his privilege not to incriminate himself.